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ngx_http_upload_module.c
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/*
* Copyright (C) hongzhidao https://github.com/hongzhidao
* Copyright (C) 2006, 2008 Valery Kholodkov
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
#if (NGX_HAVE_OPENSSL_MD5_H)
#include <openssl/md5.h>
#else
#include <md5.h>
#endif
#if (NGX_HAVE_OPENSSL_SHA1_H)
#include <openssl/sha.h>
#else
#include <sha.h>
#endif
#if (NGX_OPENSSL_MD5)
#define MD5Init MD5_Init
#define MD5Update MD5_Update
#define MD5Final MD5_Final
#endif
#define MULTIPART_FORM_DATA_STRING "multipart/form-data"
#define BOUNDARY_STRING "boundary="
#define CONTENT_DISPOSITION_STRING "Content-Disposition:"
#define CONTENT_TYPE_STRING "Content-Type:"
#define CONTENT_RANGE_STRING "Content-Range:"
#define X_CONTENT_RANGE_STRING "X-Content-Range:"
#define SESSION_ID_STRING "Session-ID:"
#define X_SESSION_ID_STRING "X-Session-ID:"
#define FORM_DATA_STRING "form-data"
#define ATTACHMENT_STRING "attachment"
#define FILENAME_STRING "filename=\""
#define FIELDNAME_STRING "name=\""
#define BYTES_UNIT_STRING "bytes "
#define NGX_UPLOAD_MALFORMED -1
#define NGX_UPLOAD_NOMEM -2
#define NGX_UPLOAD_IOERROR -3
#define NGX_UPLOAD_SCRIPTERROR -4
#define NGX_UPLOAD_TOOLARGE -5
/*
* State of multipart/form-data parser
*/
typedef enum {
upload_state_boundary_seek,
upload_state_after_boundary,
upload_state_headers,
upload_state_data,
upload_state_finish
} upload_state_t;
/*
* Range
*/
typedef struct {
off_t start, end, total;
} ngx_http_upload_range_t;
/*
* State of range merger
*/
typedef struct {
ngx_buf_t *in_buf;
ngx_buf_t *out_buf;
ngx_http_upload_range_t current_range_n;
off_t *parser_state;
ngx_log_t *log;
u_char *range_header_buffer;
u_char *range_header_buffer_end;
u_char **range_header_buffer_pos;
unsigned int found_lower_bound:1;
unsigned int complete_ranges:1;
unsigned int first_range:1;
} ngx_http_upload_merger_state_t;
/*
* Template for a field to generate in output form
*/
typedef struct {
ngx_table_elt_t value;
ngx_array_t *field_lengths;
ngx_array_t *field_values;
ngx_array_t *value_lengths;
ngx_array_t *value_values;
} ngx_http_upload_field_template_t;
/*
* Filter for fields in output form
*/
typedef struct {
#if (NGX_PCRE)
ngx_regex_t *regex;
ngx_int_t ncaptures;
#else
ngx_str_t text;
#endif
} ngx_http_upload_field_filter_t;
/*
* Upload cleanup record
*/
typedef struct ngx_http_upload_cleanup_s {
ngx_fd_t fd;
u_char *filename;
ngx_http_headers_out_t *headers_out;
ngx_array_t *cleanup_statuses;
ngx_log_t *log;
unsigned int aborted:1;
} ngx_upload_cleanup_t;
/*
* Upload configuration for specific location
*/
typedef struct {
ngx_str_t url;
ngx_http_complex_value_t *url_cv;
ngx_path_t *state_store_path;
ngx_path_t *store_path;
ngx_uint_t store_access;
size_t buffer_size;
size_t merge_buffer_size;
size_t range_header_buffer_size;
size_t max_header_len;
size_t max_output_body_len;
off_t max_file_size;
ngx_array_t *field_templates;
ngx_array_t *aggregate_field_templates;
ngx_array_t *field_filters;
ngx_array_t *cleanup_statuses;
ngx_flag_t forward_args;
ngx_flag_t tame_arrays;
ngx_flag_t resumable_uploads;
size_t limit_rate;
unsigned int md5:1;
unsigned int sha1:1;
unsigned int crc32:1;
} ngx_http_upload_loc_conf_t;
typedef struct ngx_http_upload_md5_ctx_s {
MD5_CTX md5;
u_char md5_digest[MD5_DIGEST_LENGTH * 2];
} ngx_http_upload_md5_ctx_t;
typedef struct ngx_http_upload_sha1_ctx_s {
SHA_CTX sha1;
u_char sha1_digest[SHA_DIGEST_LENGTH * 2];
} ngx_http_upload_sha1_ctx_t;
struct ngx_http_upload_ctx_s;
/*
* Request body data handler
*/
typedef ngx_int_t (*ngx_http_request_body_data_handler_pt)
(struct ngx_http_upload_ctx_s*, u_char *, u_char*);
/*
* Upload module context
*/
typedef struct ngx_http_upload_ctx_s {
ngx_str_t session_id;
ngx_str_t boundary;
u_char *boundary_start;
u_char *boundary_pos;
upload_state_t state;
u_char *header_accumulator;
u_char *header_accumulator_end;
u_char *header_accumulator_pos;
ngx_str_t field_name;
ngx_str_t file_name;
ngx_str_t content_type;
ngx_str_t content_range;
ngx_http_upload_range_t content_range_n;
ngx_uint_t ordinal;
u_char *output_buffer;
u_char *output_buffer_end;
u_char *output_buffer_pos;
u_char *merge_buffer;
u_char *range_header_buffer;
u_char *range_header_buffer_pos;
u_char *range_header_buffer_end;
ngx_http_request_body_data_handler_pt data_handler;
ngx_int_t (*start_part_f)(struct ngx_http_upload_ctx_s *upload_ctx);
void (*finish_part_f)(struct ngx_http_upload_ctx_s *upload_ctx);
void (*abort_part_f)(struct ngx_http_upload_ctx_s *upload_ctx);
ngx_int_t (*flush_output_buffer_f)(struct ngx_http_upload_ctx_s *upload_ctx, u_char *buf, size_t len);
ngx_http_request_t *request;
ngx_log_t *log;
ngx_file_t output_file;
ngx_file_t state_file;
ngx_chain_t *chain;
ngx_chain_t *last;
ngx_chain_t *checkpoint;
size_t output_body_len;
size_t limit_rate;
ssize_t received;
ngx_pool_cleanup_t *cln;
ngx_http_upload_md5_ctx_t *md5_ctx;
ngx_http_upload_sha1_ctx_t *sha1_ctx;
uint32_t crc32;
unsigned int first_part:1;
unsigned int discard_data:1;
unsigned int is_file:1;
unsigned int partial_content:1;
unsigned int prevent_output:1;
unsigned int calculate_crc32:1;
unsigned int started:1;
unsigned int unencoded:1;
unsigned int no_content:1;
unsigned int raw_input:1;
} ngx_http_upload_ctx_t;
static ngx_int_t ngx_http_upload_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_read_upload_client_request_body(ngx_http_request_t *r);
static ngx_int_t ngx_http_upload_body_handler(ngx_http_request_t *r);
static void ngx_http_read_upload_client_request_body_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r);
static ngx_int_t ngx_http_request_body_filter(ngx_http_request_t *r,
ngx_chain_t *in);
static ngx_int_t ngx_http_request_body_length_filter(ngx_http_request_t *r,
ngx_chain_t *in);
static ngx_int_t ngx_http_request_body_chunked_filter(ngx_http_request_t *r,
ngx_chain_t *in);
static ngx_int_t ngx_http_process_request_body(ngx_http_request_t *r,
ngx_chain_t *in);
static void *ngx_http_upload_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_upload_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child);
static ngx_int_t ngx_http_upload_add_variables(ngx_conf_t *cf);
static void ngx_http_upload_variable_set(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_md5_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_sha1_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_file_size_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_upload_content_range_variable_set(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_content_range_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_crc32_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_upload_uint_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static char *ngx_http_upload_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_int_t ngx_http_upload_start_handler(ngx_http_upload_ctx_t *u);
static void ngx_http_upload_finish_handler(ngx_http_upload_ctx_t *u);
static void ngx_http_upload_abort_handler(ngx_http_upload_ctx_t *u);
static ngx_int_t ngx_http_upload_flush_output_buffer(ngx_http_upload_ctx_t *u,
u_char *buf, size_t len);
static ngx_int_t ngx_http_upload_append_field(ngx_http_upload_ctx_t *u,
ngx_str_t *name, ngx_str_t *value);
static ngx_int_t ngx_http_upload_merge_ranges(ngx_http_upload_ctx_t *u, ngx_http_upload_range_t *range_n);
static ngx_int_t ngx_http_upload_parse_range(ngx_str_t *range, ngx_http_upload_range_t *range_n);
static char *ngx_http_upload_set_form_field(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_upload_pass_form_field(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_upload_cleanup(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static void ngx_upload_cleanup_handler(void *data);
/*
* upload_init_ctx
*
* Initialize upload context. Memory for upload context which is being passed
* as upload_ctx parameter could be allocated anywhere and should not be freed
* prior to upload_shutdown_ctx call.
*
* IMPORTANT:
*
* After initialization the following routine SHOULD BE called:
*
* upload_parse_content_type -- to assign part boundary
*
* Parameter:
* upload_ctx -- upload context which is being initialized
*
*/
static void upload_init_ctx(ngx_http_upload_ctx_t *upload_ctx);
/*
* upload_shutdown_ctx
*
* Shutdown upload context. Discard all remaining data and
* free all memory associated with upload context.
*
* Parameter:
* upload_ctx -- upload context which is being shut down
*
*/
static void upload_shutdown_ctx(ngx_http_upload_ctx_t *upload_ctx);
/*
* upload_start
*
* Starts multipart stream processing. Initializes internal buffers
* and pointers
*
* Parameter:
* upload_ctx -- upload context which is being initialized
*
* Return value:
* NGX_OK on success
* NGX_ERROR if error has occured
*
*/
static ngx_int_t upload_start(ngx_http_upload_ctx_t *upload_ctx, ngx_http_upload_loc_conf_t *ulcf);
/*
* upload_parse_request_headers
*
* Parse and verify HTTP headers, extract boundary or
* content disposition
*
* Parameters:
* upload_ctx -- upload context to populate
* headers_in -- request headers
*
* Return value:
* NGX_OK on success
* NGX_ERROR if error has occured
*/
static ngx_int_t upload_parse_request_headers(ngx_http_upload_ctx_t *upload_ctx, ngx_http_headers_in_t *headers_in);
/*
* upload_process_buf
*
* Process buffer with multipart stream starting from start and terminating
* by end, operating on upload_ctx. The header information is accumulated in
* This call can invoke one or more calls to start_upload_file, finish_upload_file,
* abort_upload_file and flush_output_buffer routines.
*
* Returns value NGX_OK successful
* NGX_UPLOAD_MALFORMED stream is malformed
* NGX_UPLOAD_NOMEM insufficient memory
* NGX_UPLOAD_IOERROR input-output error
* NGX_UPLOAD_SCRIPTERROR nginx script engine failed
* NGX_UPLOAD_TOOLARGE field body is too large
*/
static ngx_int_t upload_process_buf(ngx_http_upload_ctx_t *upload_ctx, u_char *start, u_char *end);
static ngx_int_t upload_process_raw_buf(ngx_http_upload_ctx_t *upload_ctx, u_char *start, u_char *end);
#if defined nginx_version && nginx_version >= 7052
static ngx_path_init_t ngx_http_upload_temp_path = {
ngx_string(NGX_HTTP_PROXY_TEMP_PATH), { 1, 2, 0 }
};
#endif
static ngx_command_t ngx_http_upload_commands[] = { /* {{{ */
/*
* Enables uploads for location and specifies location to pass modified request to
*/
{ ngx_string("upload_pass"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_http_upload_pass,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
/*
* Specifies base path of file store
*/
{ ngx_string("upload_store"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1234,
ngx_conf_set_path_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, store_path),
NULL },
/*
* Specifies base path of state store
*/
{ ngx_string("upload_state_store"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
ngx_conf_set_path_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, state_store_path),
NULL },
/*
* Specifies the access mode for files in store
*/
{ ngx_string("upload_store_access"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE123,
ngx_conf_set_access_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, store_access),
NULL },
/*
* Specifies the size of buffer, which will be used
* to write data to disk
*/
{ ngx_string("upload_buffer_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, buffer_size),
NULL },
/*
* Specifies the size of buffer, which will be used
* for merging ranges into state file
*/
{ ngx_string("upload_merge_buffer_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, merge_buffer_size),
NULL },
/*
* Specifies the size of buffer, which will be used
* for returning range header
*/
{ ngx_string("upload_range_header_buffer_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, range_header_buffer_size),
NULL },
/*
* Specifies the maximal length of the part header
*/
{ ngx_string("upload_max_part_header_len"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, max_header_len),
NULL },
/*
* Specifies the maximal size of the file to be uploaded
*/
{ ngx_string("upload_max_file_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_conf_set_off_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, max_file_size),
NULL },
/*
* Specifies the maximal length of output body
*/
{ ngx_string("upload_max_output_body_len"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, max_output_body_len),
NULL },
/*
* Specifies the field to set in altered response body
*/
{ ngx_string("upload_set_form_field"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE2,
ngx_http_upload_set_form_field,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, field_templates),
NULL},
/*
* Specifies the field with aggregate parameters
* to set in altered response body
*/
{ ngx_string("upload_aggregate_form_field"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE2,
ngx_http_upload_set_form_field,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, aggregate_field_templates),
NULL},
/*
* Specifies the field to pass to backend
*/
{ ngx_string("upload_pass_form_field"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_http_upload_pass_form_field,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
/*
* Specifies http statuses upon reception of
* which cleanup of uploaded files will be initiated
*/
{ ngx_string("upload_cleanup"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_1MORE,
ngx_http_upload_cleanup,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL},
/*
* Specifies the whether or not to forward query args
* to the upload_pass redirect location
*/
{ ngx_string("upload_pass_args"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, forward_args),
NULL },
/*
* Specifies request body reception rate limit
*/
{ ngx_string("upload_limit_rate"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, limit_rate),
NULL },
/*
* Specifies whether array brackets in file field names must be dropped
*/
{ ngx_string("upload_tame_arrays"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, tame_arrays),
NULL },
/*
* Specifies whether resumable uploads are allowed
*/
{ ngx_string("upload_resumable"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_upload_loc_conf_t, resumable_uploads),
NULL },
ngx_null_command
}; /* }}} */
ngx_http_module_t ngx_http_upload_module_ctx = { /* {{{ */
ngx_http_upload_add_variables, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_upload_create_loc_conf, /* create location configuration */
ngx_http_upload_merge_loc_conf /* merge location configuration */
}; /* }}} */
ngx_module_t ngx_http_upload_module = { /* {{{ */
NGX_MODULE_V1,
&ngx_http_upload_module_ctx, /* module context */
ngx_http_upload_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
}; /* }}} */
static ngx_http_variable_t ngx_http_upload_variables[] = { /* {{{ */
{ ngx_string("upload_field_name"), NULL, ngx_http_upload_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, field_name),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_content_type"),
ngx_http_upload_variable_set,
ngx_http_upload_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, content_type),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_name"), NULL, ngx_http_upload_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, file_name),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_number"), NULL, ngx_http_upload_uint_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, ordinal),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_tmp_path"), NULL, ngx_http_upload_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, output_file.name),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_content_range"),
ngx_http_upload_content_range_variable_set,
ngx_http_upload_content_range_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, content_range_n),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
}; /* }}} */
static ngx_http_variable_t ngx_http_upload_aggregate_variables[] = { /* {{{ */
{ ngx_string("upload_file_md5"), NULL, ngx_http_upload_md5_variable,
(uintptr_t) "0123456789abcdef",
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_md5_uc"), NULL, ngx_http_upload_md5_variable,
(uintptr_t) "0123456789ABCDEF",
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_sha1"), NULL, ngx_http_upload_sha1_variable,
(uintptr_t) "0123456789abcdef",
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_sha1_uc"), NULL, ngx_http_upload_sha1_variable,
(uintptr_t) "0123456789ABCDEF",
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_crc32"), NULL, ngx_http_upload_crc32_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, crc32),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_string("upload_file_size"), NULL, ngx_http_upload_file_size_variable,
(uintptr_t) offsetof(ngx_http_upload_ctx_t, output_file.offset),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
}; /* }}} */
static ngx_str_t ngx_http_upload_empty_field_value = ngx_null_string;
static ngx_str_t ngx_upload_field_part1 = { /* {{{ */
sizeof(CRLF CONTENT_DISPOSITION_STRING " form-data; name=\"") - 1,
(u_char*)CRLF CONTENT_DISPOSITION_STRING " form-data; name=\""
}; /* }}} */
static ngx_str_t ngx_upload_field_part2 = { /* {{{ */
sizeof("\"" CRLF CRLF) - 1,
(u_char*)"\"" CRLF CRLF
}; /* }}} */
static ngx_int_t /* {{{ ngx_http_upload_handler */
ngx_http_upload_handler(ngx_http_request_t *r)
{
ngx_http_upload_loc_conf_t *ulcf;
ngx_http_upload_ctx_t *u;
ngx_int_t rc;
if (!(r->method & NGX_HTTP_POST))
return NGX_HTTP_NOT_ALLOWED;
ulcf = ngx_http_get_module_loc_conf(r, ngx_http_upload_module);
u = ngx_http_get_module_ctx(r, ngx_http_upload_module);
if (u == NULL) {
u = ngx_pcalloc(r->pool, sizeof(ngx_http_upload_ctx_t));
if (u == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_http_set_ctx(r, u, ngx_http_upload_module);
}
if(ulcf->md5) {
if(u->md5_ctx == NULL) {
u->md5_ctx = ngx_palloc(r->pool, sizeof(ngx_http_upload_md5_ctx_t));
if (u->md5_ctx == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
}else
u->md5_ctx = NULL;
if(ulcf->sha1) {
if(u->sha1_ctx == NULL) {
u->sha1_ctx = ngx_palloc(r->pool, sizeof(ngx_http_upload_sha1_ctx_t));
if (u->sha1_ctx == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
}else
u->sha1_ctx = NULL;
u->calculate_crc32 = ulcf->crc32;
u->request = r;
u->log = r->connection->log;
u->chain = u->last = u->checkpoint = NULL;
u->output_body_len = 0;
u->prevent_output = 0;
u->no_content = 1;
u->limit_rate = ulcf->limit_rate;
u->received = 0;
u->ordinal = 0;
upload_init_ctx(u);
rc = upload_parse_request_headers(u, &r->headers_in);
if(rc != NGX_OK) {
upload_shutdown_ctx(u);
return rc;
}
if(upload_start(u, ulcf) != NGX_OK)
return NGX_HTTP_INTERNAL_SERVER_ERROR;
rc = ngx_http_read_upload_client_request_body(r);
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
return rc;
}
return NGX_DONE;
} /* }}} */
static ngx_int_t
ngx_http_read_upload_client_request_body(ngx_http_request_t *r)
{
size_t preread;
ssize_t size;
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t out;
ngx_http_request_body_t *rb;
ngx_http_core_loc_conf_t *clcf;
ngx_http_upload_ctx_t *u;
u = ngx_http_get_module_ctx(r, ngx_http_upload_module);
r->main->count++;
if (r != r->main || r->request_body || r->discard_body) {
return NGX_OK;
}
if (ngx_http_test_expect(r) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
if (rb == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
/*
* set by ngx_pcalloc():
*
* rb->bufs = NULL;
* rb->buf = NULL;
* rb->free = NULL;
* rb->busy = NULL;
* rb->chunked = NULL;
*/
rb->rest = -1;
r->request_body = rb;
if (r->headers_in.content_length_n < 0 && !r->headers_in.chunked) {
return NGX_OK;
}
preread = r->header_in->last - r->header_in->pos;
if (preread) {
/* there is the pre-read part of the request body */
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http client request body preread %uz", preread);
u->received = preread;
out.buf = r->header_in;
out.next = NULL;
rc = ngx_http_request_body_filter(r, &out);
if (rc != NGX_OK) {
switch(rc) {
case NGX_UPLOAD_MALFORMED:
rc = NGX_HTTP_BAD_REQUEST;
break;
case NGX_UPLOAD_TOOLARGE:
rc = NGX_HTTP_REQUEST_ENTITY_TOO_LARGE;
break;
case NGX_UPLOAD_IOERROR:
rc = NGX_HTTP_SERVICE_UNAVAILABLE;
break;
case NGX_UPLOAD_NOMEM:
case NGX_UPLOAD_SCRIPTERROR:
default:
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
}
goto done;
}
r->request_length += preread - (r->header_in->last - r->header_in->pos);
if (!r->headers_in.chunked
&& rb->rest > 0
&& rb->rest <= (off_t) (r->header_in->end - r->header_in->last))
{
/* the whole request body may be placed in r->header_in */
b = ngx_calloc_buf(r->pool);
if (b == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
b->temporary = 1;
b->start = r->header_in->pos;
b->pos = r->header_in->pos;
b->last = r->header_in->last;
b->end = r->header_in->end;
rb->buf = b;
r->read_event_handler = ngx_http_read_upload_client_request_body_handler;
r->write_event_handler = ngx_http_request_empty_handler;
rc = ngx_http_do_read_client_request_body(r);
goto done;
}
} else {
/* set rb->rest */
if (ngx_http_request_body_filter(r, NULL) != NGX_OK) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
}
if (rb->rest == 0) {
/* the whole request body was pre-read */
return NGX_OK;
}
if (rb->rest < 0) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"negative request body rest");
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
size = clcf->client_body_buffer_size;
size += size >> 2;
/* TODO: honor r->request_body_in_single_buf */
if (!r->headers_in.chunked && rb->rest < size) {
size = (ssize_t) rb->rest;
if (r->request_body_in_single_buf) {
size += preread;
}
} else {
size = clcf->client_body_buffer_size;
}
rb->buf = ngx_create_temp_buf(r->pool, size);
if (rb->buf == NULL) {
rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
goto done;
}
r->read_event_handler = ngx_http_read_upload_client_request_body_handler;
r->write_event_handler = ngx_http_request_empty_handler;
rc = ngx_http_do_read_client_request_body(r);
done:
if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
upload_shutdown_ctx(u);
r->main->count--;
}
return rc;
}
static void
ngx_http_read_upload_client_request_body_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_event_t *rev;
ngx_http_core_loc_conf_t *clcf;
ngx_http_upload_ctx_t *u;
rev = r->connection->read;
u = ngx_http_get_module_ctx(r, ngx_http_upload_module);
if (rev->timedout) {
if(!rev->delayed) {
r->connection->timedout = 1;
upload_shutdown_ctx(u);
ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
return;
}
rev->timedout = 0;
rev->delayed = 0;
if (!rev->ready) {
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
ngx_add_timer(rev, clcf->client_body_timeout);
if (ngx_handle_read_event(rev, clcf->send_lowat) != NGX_OK) {
upload_shutdown_ctx(u);
ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
}
return;
}
}
else{
if (r->connection->read->delayed) {
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
"http read delayed");
if (ngx_handle_read_event(rev, clcf->send_lowat) != NGX_OK) {
upload_shutdown_ctx(u);
ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
}
return;